676670681 has 4 divisors (see below), whose sum is σ = 676729764. Its totient is φ = 676611600.

The previous prime is 676670651. The next prime is 676670719. The reversal of 676670681 is 186076676.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 286963600 + 389707081 = 16940^2 + 19741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-676670681 is a prime.

It is a super-2 number, since 2×676670681² = 915766421050007522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (676670641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6230 + ... + 37311.

It is an arithmetic number, because the mean of its divisors is an integer number (169182441).

Almost surely, 2^676670681 is an apocalyptic number.

It is an amenable number.

676670681 is a deficient number, since it is larger than the sum of its proper divisors (59083).

676670681 is a wasteful number, since it uses less digits than its factorization.

676670681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59082.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 676670681 is about 26012.8945140674. The cubic root of 676670681 is about 877.9284438444.

The spelling of 676670681 in words is "six hundred seventy-six million, six hundred seventy thousand, six hundred eighty-one".